primary standard sample

英 [primary standard sample]
美 [primary standard sample]

中文释义

一级标样

单词分析

单词结构：

primary standard sample

字母数：23

记忆提示

🎯 重点记忆：

  • 单词拼写：primary standard sample
  • 核心含义：一级标样

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更新时间：2026-03-10 19:30:31